Textile bobbin



e5am. 6, 1953 c. K. DUNLAP TEXTILE BOBBIN Filed Deo. 29, 1948 :inventorGttornegs Patented Jan. 6, 1953 TEXTILE BOBBIN Charles K. Dunlap,Hartsville, S. C., assignor to Sonoco Products Company', a corporationof South Carolina Application December 29, 1948, Serial No. 67,809l

3 Claims.

This invention relates to textile bobbins adapted for use as supportingcores for yarn windings and the like.

Such bobbins or spools are used in large quantities in the textileindustry as carriers for handling yarn in various processing operations.These bobbins or spools are predominantly formed of paper because of thecost advantage and light weight characteristics afforded by thismaterial. A common type of bobbin, often referred to as a bottle bobbin,comprises a cylindrical barrel having a frusto-conical head securedthereon adjacent an end. If the barrel is fitted with a head at bothends the resulting carrier is usually referred to more specifically as aspool.

The heads for bobbins of this type are usually formed with cylindricalapertures closely fitting the cylindrical barrel and opening at thesmall end of the head in a feathered edge so that the shoulder left atthe joint between the head and the barrel may be minimized to thefullest extent in order to avoid rolling and tangling of yarn windingslaid on the bobbin at this point. At the best, however, a discernibleshoulder remains at this joint, and substantial diiculty is encounteredin maintaining this shoulder within acceptable limits when large scaleproduction methods are employed in forming the bobbins.

This difficulty is obviated according to the present invention byinvesting bobbins of the above described type with a coating of discretefibers adhesively secured on the head and extending slightly beyond thehead over a circumferential portion of the barrel so that a continuousyarn supporting surface is presented at the joint between the head andbarrel. In this manner, the shoulder left where the head joins thebarrel may -be obscured so that it is no longer a critical productionfactor, and the coating of discrete fibers moreover` provides a windingsurface on the head adapted to maintain the yarn windings againstslippage.

A textile bobbin formed in this manner according to the presentinvention is illustrated in the accompanying drawing, in which:

Fig. 1 is a side elevation of a textile bobbin embodying the invention;

Fig. 2 is a top plan View; and,

Fig. 3 is a vertical section.

In the textile bobbin illustrated in the drawing, the bobbin barrel isindicated at Il] and the head of the bobbin at I2. The barrel IU and thehead I2 are shown in the drawing as having a laminated paper structure,although a molded structure might also be used and these elements mightbe formed of any other suitable material, such'as plastic, if desired.

As shown best in Fig. 3 of the drawing, the bobbin head I2 is formedwith a feathered, cylindrical, axial aperture I4 at its small end, whichis proportioned to fit closely over the outer surface of the bobbinbarrel Iii when the head I2 is assembled in place. Adhesive may beapplied to secure the head I2 to the barrel IQ at this point, and theAhead I2 may conveniently be formed with the axial aperture Id forassembly on the barrel I and set in place in the manner disclosed inmyprior Patents Nos. 1,731,565 and 1,731,735; although in the present casethe bobbin barrel I0 is preferably formed in a length sufficient toextend to the large bottom end of the head I 2, so that it may be formedoutwardly at its lower end as at It to engage a central aperture in aspacing disc I3 tted in the large end of the head I2.

W'here the bobbin head I2 is formed with a laminated paper structure aspreviously mentioned, it is also desirable to arrange this structure sothat at least one of the outer plies terminates short of the largebottom end of the head I2 so as to form a circumferential shoulderedportion 28 adjacent the large end of the head I2 for accommodating atail leading to the yarn windings supported on the bobbin in the usualmanner. Also, if desired, suitable slots or other openings (not shown)may -be arranged at this large end of the head I2 for securing the freeend of the tail so that it is readily accessible.

The textile bobbin illustrated in the drawing is further conditionedaccording to the present invention by a coating of discrete fibers asindicated at 22 adhesively secured on the head I2 and over acircumferential portion of the barrel It) extending slightly beyond thehead I2. By this means, a continuous yarn supporting surface ispresented at the joint between the head I2 and the barrel I0, aspreviously mentioned, so that this joint is obscured and all diflicultywith disposition of the yarn windings at this point is obviated. Also,the coating of discrete fibers 22 provides a smooth surface continuityat the shouldered portion adjacent the large end of the head I2, andfurther invests the head I2 with a winding surface which is nicelyadapted for retaining yarn windings thereon against slippage. The,lcoating of discrete fibers 22 may consist of cotton nock or the like asdisclosed in my copending application, Serial No. 709,875, filedNovember 14, 1946, and may be applied as disclosed in detail in thatapplication.

Iclaim:

1. A textile bobbin comprising a cylindrical barrel, a frustro-conicalhead secured on said barrel adjacent an end thereof, said head having acylindrical aperture closely fitting the outer surface of said barrel,and a continuous coating of discrete fibers adhesively secured on saidhead and on said barrel over a circumferential portion of said barrelextending slightly beyond said head, whereby a continuous yarnsupporting surface conforming to the shape of said head and barrelportion is presented by said fiber coating at the joint between saidhead and barrel and said fiber coating serves to condition said head forretaining yarn windings thereon against slippage and merges superciallywith said barrel beyond said head.

2. A textile bobbin comprising a cylindrical barrel, a frustro-conicalhead secured on said barrel adjacent an end thereof, said head having alaminated structure in which at least one of the outer plies terminatesshort of the base of said head forming a circumferential shoulderedportion adjacent said base for accommodating a tail leading to yarnwindings supported on said bobbin, and said head being formed with acylindrical aperture closely tting the outer surface of said barrel, andan adhesively secured coating of discrete bers on said head andextending slightly beyond said head over a circumferential portion ofsaid barrel for retaining yarn windings on said head against slippageand for providing -a smooth surface continuity at the shouldered portionon said head adjacent said base and at the joint between said head andsaid barrel.

3. A textile bobbin comprising a cylindrical 4 barrel, and afrustro-conical head secured on said barrel adjacent an end thereof,said head being formed with a feathered, cylindrical, axial aperture atits small end proportioned to t closely over the outer surface cf saidbarrel, and said head and a circumferential portion of said barrelextending slightly beyond said head being invested with a continuouscoating of discrete bers adhesively secured thereto, whereby acontinuous yarn supporting surface conforming to the shape of said headand barrel portion is presented at the joint between said head andbarrel and said head is conditioned for retaining yarn windings thereonagainst slippage by said ber coating, and which ber coating merges withsaid barrel beyond said head without producing any surface irregularityto disturb the handling of yarn windings on said barrel.

CHARLES K. DUNLAP.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 187,556 Pratt Feb. 20, 1877398,002 Scott Feb. 19, 1889 431,227 Hegeman July l, 1890 1,731,565Dunlap Oct. 15, 1929 1,992,258 Taylor Feb. 26, 1935 FOREIGN PATENTSNumber Country Date 10,666 Holland Nov. 17, 1923 127,760 SwitzerlandSept. 17, 1928 397,428 Great Britain Aug. 24, 1933

